Παραπομπή σε μορφή APA (7η εκδ.)

Roewer, U. (2008). Environmental Protection Expenditure by Industry in the European Union 1997-2004. Statistic in focus: Environment and energy.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Roewer, Ute. "Environmental Protection Expenditure by Industry in the European Union 1997-2004." Statistic in Focus: Environment and Energy 2008.

Παραπομπή σε μορφή MLA (8th εκδ.)

Roewer, Ute. "Environmental Protection Expenditure by Industry in the European Union 1997-2004." Statistic in Focus: Environment and Energy, 2008.